"03" engine knock/rattle

[shooter]

Good day all; I am new here. I am curious as to whether anyone here is going thru this problem as I am going thru. This engine rattle , or spark knock, is what I call it. Only happens at certain rpm levels. Mainly at around 1000 to 2000 rpm.
I was told it might be the tension belt kit? anyway it is driving me a little crazy, and thats not too much driving, lol. My 4.3 has 80,000 on it I have changed plugs to the platinum ones and have changed wires also, thinking it was a spark prob. Any ideas?
Thanks
Shooter

[Badco]

Bosch Platinums? If so, they aren't all that great. Those plugs are mainly geared for the high rpm 4 banger import engines. The good 'ol AC Delcos or NGK's are best.
As far as your knocking goes, I was having problems as well but in higher RPM ranges.

Is your MAF clean? If you have a K&N filter or something else that has oil on the filter, that oil tends to coat on the elements on the MAF and is said to cause a few issues.

[shooter]

Yes they are the plugs in queston, and yes I have a K &N filter also, but --- This knocking was happening long beore I changed to these things. I do know that GM had a tsb on the problem once long ago. I read that the noise is from a pully tensioner that wears out, or something. The cost to repair the tensioner kit is quite expensive. I was hoping someone in here could tell me they were full of s### and it would be repairable in a different way.
Thanks for the input.

[mrmidnight]

Dude, get out of those bosches as fast as possible, the prongs on them tend to break off into the cylinder, and then you will have more problems than knocking brother.

[Sparky2263]

The bulletin addresses a knock/rattle between 1800 and 2200 rpms. It's not a reliability issue so it's not something you have to do.

It is a tensioner that goes inside the timing cover. The manual calls for removing the oil pan (not necessary) to perform the job therefore the high labor cost.

I wouldn't sweat it.

[THA_BAD_ONE-0]

what if its a tick when it idles.

[THA_BAD_ONE-0]

I looked at it i think when me a my dad put my motor in we but a wrong bolt in the flywheel.

[shooter]

The bulletin addresses a knock/rattle between 1800 and 2200 rpms. It's not a reliability issue so it's not something you have to do.

It is a tensioner that goes inside the timing cover. The manual calls for removing the oil pan (not necessary) to perform the job therefore the high labor cost.

I wouldn't sweat it.


Finally I am back from vacation. Sorry for not communicating.
I was worried that this knock may cause the fuel mileage to drop, or may cause internal damage to the engine. So---- I need to get rid of my spark plugs eh?
Is there a good brand to get, And is there a better filter for my backyard box than my K&N one?

[Sparky2263]

Delco or NGK on the plugs.

The FRAM Air Hog on the filter.

[shooter]

COOL Thanks. I wish I had asked before I bought the other plugs, and filter.
Oh well, live and learn again I guess.